How Do Kitchen Fitters Deal With Uneven Walls?

Scribing

Scribing is the primary technique for dealing with uneven walls. A panel, end panel or filler piece is held against the wall and a scribe line is drawn on it using a compass or scribing tool. The panel is then cut to that line and sits perfectly against the wall's actual surface.

Packing Out

Where a wall has a significant bulge in the centre but is flatter at the sides, units may be packed out from the wall to clear the bulge. This creates a gap between the back of the unit and the wall, which is then covered by the end panel or by a filler strip.

When Walls Need More Work

If walls are severely out of plumb (more than 20–25mm variation), plastering or dot-and-dab plasterboard may be needed before kitchen installation to create a workable surface. A thorough pre-installation survey will identify if this level of preparation is required.

Scribing vs Packing Out: When to Use Each

Why This Matters More at the End of a Run

The end unit of a run against a wall is where uneven wall problems become most visible, since any gap has nowhere to hide behind an adjacent unit — this is why end panels are almost always scribed individually to the specific wall they meet, rather than cut to a standard size in advance.

Does Wall Unevenness Affect Tiling Later?

Yes, indirectly — if a wall is significantly out of plumb behind where a splashback will go, the tiler will need to account for this separately when setting the tile line, since kitchen unit scribing doesn't solve the wall condition above the worktop.